archive/dragora-tools/dragora-keymap

   1 #! /bin/sh -
   2 #
   3 # A script to configure the keyboard map on console
   4 #
   5 # Copyright (c) 2019-2021 Matias Fonzo, <selk@dragora.org>.
   6 #
   7 # Licensed under the Apache License, Version 2.0 (the "License");
   8 # you may not use this file except in compliance with the License.
   9 # You may obtain a copy of the License at
  10 #
  11 #    http://www.apache.org/licenses/LICENSE-2.0
  12 #
  13 # Unless required by applicable law or agreed to in writing, software
  14 # distributed under the License is distributed on an "AS IS" BASIS,
  15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 # See the License for the specific language governing permissions and
  17 # limitations under the License.
  18
  19 # Exit immediately on any error
  20 set -e
  21
  22 PROGRAM="${0##*/}"
  23 TMPDIR="${TMPDIR:-$HOME}"
  24 TMPFILE="${TMPDIR}/.${PROGRAM}.${RANDOM-0}$$"
  25 OUTPUT="${TMPFILE}.data"
  26 LOCKFILE=/var/lock/dragora-keymap.lockfile
  27 KEYMAPS="${KEYMAPS:-/usr/share/keymaps/i386}"
  28
  29 chkstatus_or_exit()
  30 {
  31     status=$?
  32
  33     # Clean up temporary files
  34     rm -f -- "$TMPFILE" "$LOCKFILE"
  35
  36     if test $status -ne 0
  37     then
  38         printf '%s\n' "" "Return status = $status" 1>&2
  39         exit 2;
  40     fi
  41
  42     unset -v status
  43 }
  44
  45 # Sanity checks
  46
  47 if test ! -d "$TMPDIR"
  48 then
  49     echo "${PROGRAM}: \`${TMPDIR}' is not a qualified temporary directory" 1>&2
  50     exit 1;
  51 fi
  52 if test ! -w "$TMPDIR"
  53 then
  54     echo "${PROGRAM}: \`${TMPDIR}' is not a writable temporary directory" 1>&2
  55     exit 1;
  56 fi
  57 if test ! -d "$KEYMAPS"
  58 then
  59     echo "${PROGRAM}: Directory \`${KEYMAPS}' for keyboard maps does not exist as such" 1>&2
  60     exit 1;
  61 fi
  62
  63 trap 'chkstatus_or_exit' EXIT HUP INT QUIT ABRT TERM
  64
  65 umask 077;      # Remove access for all but user.
  66
  67 # Unfortunately, loadkeys(1) is limited to the superuser;
  68 # we set a lock to allow only one instance of the script.
  69
  70 if ( set -C ; echo ": $PROGRAM - locked" > $LOCKFILE ) 2> /dev/null
  71 then
  72     true
  73 else
  74     if test -e "$LOCKFILE"
  75     then
  76         echo "Only one instance of \`${PROGRAM}' is allowed." 1>&2
  77         exit 1;
  78     else
  79         echo "${PROGRAM}: \`${LOCKFILE}' lock failed." 1>&2
  80         exit 2;
  81     fi
  82 fi
  83
  84 ### Search for keyboard map files
  85
  86 search="$(find "$KEYMAPS" \( -type l -o -type f \) -name '*.map*' -print | LC_ALL=C sort 2> /dev/tty)"
  87
  88 if test -z "$search"
  89 then
  90     echo "No keyboard maps were found in \`${KEYMAPS}'." 1>&2
  91     exit 1;
  92 fi
  93
  94 ### Compose output file to be shown
  95
  96 # Header
  97 printf '%s\n' \
  98  'dialog --colors \'                                         \
  99  ' --backtitle "\\Zb${PROGRAM} - Keyboard map selection" \'  \
 100  ' --title "MAIN MENU" --default-item "qwerty/us" --menu \'  \
 101  '"Welcome to \\Z3${PROGRAM}\\Zn!\\n\\n\'                    \
 102  'The following menu list is organized as keyboard \\n\'     \
 103  '\"layout/language\". \\n\\n\'                              \
 104  'Select a keyboard map for the console:" 20 56 6 \'         \
 105  > "$OUTPUT"
 106
 107 # Append 'search' to the body
 108
 109 for item in $search
 110 do
 111     level="${item%/*}"          # Remove all except the last slash.
 112     level="${level##*/}"        # Starting-point under which it was found.
 113     item="${item%.map*}"        # Remove extension(s).
 114     item="${item##*/}"          # Get the base name.
 115
 116     # Ignore unwanted map directories
 117     case $level in
 118     include | fgGIod)
 119         continue
 120         ;;
 121     *)
 122         echo "\"${level}/$item\"        \"\" \\" >> "$OUTPUT"
 123         ;;
 124     esac
 125 done
 126 unset -v item level search
 127
 128 # End of
 129 printf "2> \$TMPFILE\\n\\n" >> "$OUTPUT"
 130
 131 # Import menu
 132 . "$OUTPUT"
 133
 134 # Read answer from 'TMPFILE'
 135
 136 echo "" >> "$TMPFILE";          # Append new line for reading.
 137 IFS= read -r REPLY < "$TMPFILE" || exit 2;
 138
 139 # Compose values by layout/map to be set
 140
 141 layout="${REPLY%/*}"
 142 map="${REPLY##*/}"
 143
 144 unset -v REPLY
 145
 146 # Temporary files are not needed anymore
 147 rm -f -- "$TMPFILE" "$OUTPUT"
 148
 149 umask 022;      # Remove write permission for group and other.
 150
 151 # Set keyboard map
 152 loadkeys "${layout}/$map"
 153
 154 while true
 155 do
 156     testkeys="$(
 157      dialog --colors \
 158       --no-mouse --no-cancel --no-ok \
 159       --backtitle "\\Zb${PROGRAM} - Keyboard map check" \
 160       --title "SELECTED KEYMAP: ${layout}/$map" \
 161       --inputbox \
 162 "Try the chosen keyboard map by typing something.  Once satisfied\\n\
 163 type \\Zb\\Z71\\Zn (or \\Zb\\Z7y\\Zn) then hit \\Zb\\Z7ENTER\\Zn \
 164 to continue.  To choose a different keyboard map, type \\Zb\\Z72\\Zn (or \
 165 \\Zb\\Z7n\\Zn) plus \\Zb\\Z7ENTER\\Zn." 10 68 2>&1 > /dev/tty
 166     )"
 167     case $testkeys in
 168     1 | Y | y)
 169         break
 170         ;;
 171     2 | N | n)
 172         rm -f -- "$LOCKFILE"
 173         exec "$0"
 174         ;;
 175     esac
 176 done
 177 unset -v testkeys
 178
 179 dialog --colors \
 180  --backtitle "\\Zb${PROGRAM} - Configuration file" \
 181  --title "/etc/rc.conf" --yesno \
 182 "Would do you like to save this change for the next reboot?" 5 62
 183 echo ""
 184 echo "Setting 'RC_KEYMAP=${layout}/$map' on /etc/rc.conf ..."
 185 echo ",s/^\\(RC_KEYMAP\\)=.*/\\1=${layout}\\/${map}/"$'\nw' | \
 186  ed /etc/rc.conf && echo Done.
 187